AU611031B2 - Receiver for rotating lasers used in the guiding of vehicles, particularly for public works - Google Patents
Receiver for rotating lasers used in the guiding of vehicles, particularly for public works Download PDFInfo
- Publication number
- AU611031B2 AU611031B2 AU35637/89A AU3563789A AU611031B2 AU 611031 B2 AU611031 B2 AU 611031B2 AU 35637/89 A AU35637/89 A AU 35637/89A AU 3563789 A AU3563789 A AU 3563789A AU 611031 B2 AU611031 B2 AU 611031B2
- Authority
- AU
- Australia
- Prior art keywords
- receiver
- assembly
- disposed
- support
- plates
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
- 230000002093 peripheral effect Effects 0.000 claims description 10
- 238000013016 damping Methods 0.000 claims description 9
- 230000001681 protective effect Effects 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 2
- 241000371652 Curvularia clavata Species 0.000 description 1
- 101100536354 Drosophila melanogaster tant gene Proteins 0.000 description 1
- 102100026933 Myelin-associated neurite-outgrowth inhibitor Human genes 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- CPBQJMYROZQQJC-UHFFFAOYSA-N helium neon Chemical compound [He].[Ne] CPBQJMYROZQQJC-UHFFFAOYSA-N 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D1/00—Control of position, course, altitude or attitude of land, water, air or space vehicles, e.g. using automatic pilots
- G05D1/02—Control of position or course in two dimensions
- G05D1/021—Control of position or course in two dimensions specially adapted to land vehicles
- G05D1/0231—Control of position or course in two dimensions specially adapted to land vehicles using optical position detecting means
- G05D1/0234—Control of position or course in two dimensions specially adapted to land vehicles using optical position detecting means using optical markers or beacons
- G05D1/0236—Control of position or course in two dimensions specially adapted to land vehicles using optical position detecting means using optical markers or beacons in combination with a laser
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
- G01S1/70—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using electromagnetic waves other than radio waves
- G01S1/703—Details
- G01S1/7032—Transmitters
- G01S1/7034—Mounting or deployment thereof
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S2201/00—Indexing scheme relating to beacons or beacon systems transmitting signals capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters
- G01S2201/01—Indexing scheme relating to beacons or beacon systems transmitting signals capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters adapted for specific applications or environments
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S37/00—Excavating
- Y10S37/907—Automatic leveling excavators
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Computer Networks & Wireless Communication (AREA)
- Optics & Photonics (AREA)
- Aviation & Aerospace Engineering (AREA)
- Automation & Control Theory (AREA)
- Vibration Prevention Devices (AREA)
- Lasers (AREA)
- Radiation-Therapy Devices (AREA)
Description
11111 11111 11111~- V OPI DATE 29/11/89 A0JP DATE 0'4/01/90 APPLN. I D 35637 89 PCT NUMBER PCT/FR89/00221
PCT
DEMANDE INTERNATIONALE PUBLIEE EN VERTU DU TRAITE DE COOPERATION EN MATIERE DE BREVETS (PCT) (51) Classification internationale des brevets 4 0 ui o de ~uic~ int-tional WO 89/11107 GOlS 1/70, G05D 1/03 Al C ate Pa pulaio rnal le: novembre 1989 (16.1 1.89) (21) Num~ro .a demande internationale: PCT/FR89/0022 I (81) Etats disign~s: AT (brevet europ~en), AU, BE (brevet europ~en), CR (brevet europ~en), DE (brevet europeen). FR (22) Date de dip6t international: 9 mai 1989 (09.05.89) (brevet europ~en), GB (bre~et europ~en), IT (brevet europ~en), JP, LU (brevet europeen), NL (brevet euroip~en), SE (brevet europ~en), US.
Donnies relatives i In prioriti: 88/06559 10 mai 1988 (10.05.88) FR Publie Avec rapport de recherche irnernationale.
(71) D~posant (pour tous les EDats d~sign~s souf US): GY SA [FR'I FR]; 127, chemin Chantegrillet, F-691 10 Ste-Foy-les- Lyon (FR).
(72) Inventeur; et Inventeur/D~posant (CS seulernent) VUAG NAT. Louis [FR/FR]; 127, chemin Chantegrillet. F-691 10 Ste-Fovles-Lyon (FR).
(74) Mandataires: LAURENT, Michel etc. -,Cabinet Laurent, rue Louis-Chirpaz, B.P. 32, F-69131 Ecully Cedex
(FR).
(54)Title: RECEIVER FOR ROTATING LASERS USED IN THE GUIDING OF VEHICLES. PARTICULARLY FOR PU- BLIC WORKS (54)Titre: RECEPTEUR DE LASERS TOURNANTS UTILISES POUR LE GUIDAGE D'ENGINS. DE TRAVAUX PU- BLICS NOTAMMENT (57) Abstract 27 Receiver for rotating lasers use d for guiding vehicles (for example for public works) comprising a reception assembly arranged on a sup- 0 U2 port allowing for its fixing to the vehicle, said cell being comprised of C essentially plates carrying photodiodes and which are arranged about a fixed axis so as to form a column allowing the detection or the beam through out 3600, thle assembly being protected by a peripheral hous- 1 ing (27) covered by a protection hood It is characterized in that there are three plates for the photodiodes and the plates are arranged vertically about a central support axis while forming between each other an angle of 60', the mounting being such that the plates are removable and their fixing is made through damping elements arranged at each extremity of the support axis of the plates and about said support axis, (57) Abrig R~cepteur de lasers tournants utilis~s pour le guidage d'engins (de travaux publics par exemple) comportant un ensemble de reception proprement dit, dispose sur tin support permettant sa fixation sur l'engin, ladite cellule etant constitu~e essentiellement de plaquettes portant des photodiodes et qui sont dispos~es autour d'un axe fixe de manit~re 6 former une colonne permettant de capter le passage du faisceau stir 360', l'ensemble 6tant prot~g par une enceinte p~riph~rique (28) recouverte d'un capot protecteur 11 se cai tct~rise par le fait que les plaquettes de photodiodes sont au nombre de trois et sont dispos~es verticalement autour d'un axe central de maintien en formant entre elles un angle de 60' les unes par rapport aux autres, le montage 6tant r~alis de mani~re A ce qu'elles soient amovibles et leur fixation &tant r~alis~e par l'interm~diaire dl'dIments amortisseurs disposes t chaque extremite de l'axe support. des plaquettes et autour de ce dernier.
Louis /VUAGNAT Declarant's Name LOu VUAG NAT F. B. RICE CO PATENT ATTORNEYS This form is suitable for any typo of Patent Application. No legalisation required.
JI
VERIFIED TRANSLATION 0 25 719 RECEIVER FOR ROTATING LASERS USED FOR GUIDING MACHINES, PARTICULARLY PUBLIC WORKS MACHINES.
The present invention relates to a new type of receiver for rotating lasers used for guiding machines in the field of public works, agriculture or even industry.
In the present description the invention will be described for a receiver used in the public works field, but this is not limitative and a receiver of this kind could also be used in any other field where similar problems arise.
In the field of public works, for leveling ground or adjusting the slope of a trench and the like, increasing use is being made of control means consisting of equipment making use of lasers.
Figure 1 illustrates schematically the utilization of an instrument of this kind.
In general, for the purpose of bringing ground to a desired profile use is made of rotating lasers, which serve to guide the machine semi-automatically or automatically. Arrangements of this kind consist essentially of a transmitter comprising the actual laser transmitter mounted on a support and a receiver (4) which in turn is mounted on the actual machine. This receiver comprises essentially: receiver cells 6) detecting the passage of the laser beam over 360°; a telescopic or other mast M supporting said receiver; a casing permitting visual monitoring when the machine is operating semi-automatically, or a monitoring and automatic control casing permitting visual monitoring and automatic control; supply cables and cables connecting the cell and the casing.
For the operation of arrangements of this kind it is possible to use either laser diode transmitters (invisible beam) or helium-neon laser transmitters (visible beam).
A
VEIFNZiED TRANSLATION OF' 6=7 Iel 2 In a general way, lasers of this kind are used in electronic leveling instruments which, through the action of rotating the transmitter head define a horizontal or non-horizontal reference plane P, or even a vertical plane. In all cases considered in the figures the position information is obtained by means of the cell of the receiver which may either be hand held or, preferably, mounted on a telescopic or other rod (M) fixed to the machine itself.
The present invention relates more particularly to an improvement made to receivers mounted on the machines.
Up to the present time the receivers used for applying this technique have essentially consisted of a pillar carrying an assembly comprising four sets of photosensitive elements disposed at right angles to one another in order to enable a range of 360° to be covered.
The four plates are generally mounted permanently on an appropriate support and are difficult to detach, thus giving rise to a problem when one of them is broken or damaged. Receiver assemblies of this kind are therefore expensive to produce and in practice difficult to repair or maintain.
A new type of receiver has now been found and forms the subject of the present invention; this receiver makes it possible to solve these problems through the fact that it permits easy detachment of the plates supporting the photosensitive elements (photodiode). In addition, because of its very design, it allows the use of an assembly comprising only three photodiode support plates (instead of the four in receivers known hitherto), so that its cost is substantially reduced.
Finally, the receiver according to the invention makes it possible to prevent any damage which might be caused by vibrations or shocks occurring in the course of the use of the carrier machine.
G -as way, 6_8 91_ gh-e-re-Dl to an improvement ma o vers for rotating lasers e g -u'saeehg =~d-i-ng-mach-i-no=ex-aml=e==pclaz--=wes r' N 3 In one broad form the present invention provides a receiver for receiving signals transmitted from rotating beam lasers for guiding a machine, said receiver comprising: a receiver assembly disposed on a support for fastening said receiver assembly on the machine, said receiver assembly consisting essentially of plates carrying photodiodes disposed around a fixed shaft to form a pillar such that the laser beam can be detected over 360 0, and a peripheral shell capped by a protective hood about said receiver assembly, wherein the photodiode plates are three in number, disposed vertically around a vertical, central support shaft forming an angle of 600 to one another, means for detachably mounting said plates to said shaft and damping members disposed at each end of the plate support shaft and around the shaft.
o In addition, in a preferred embodiment of the Soo invention: the peripheral shell is capped by a protective hood projecting beyond the peripheral shell and eliminating all risk of damage to said shell when the o receiver is removed from the machine and laid on its side; o the casing supporting the receiver assembly is essentially in the form of a parallelepiped consisting of two parts articulated to one another, one part supporting the receiver proper and the other part being provided with means enabling said casing to be locked on a support 0o° pillar; in an embodiment of this kind the locking is advantageously effected by means of an assembly comprising a V-shaped part against which the support pillar will bear, the locking of the latter being effected by a presser member, whose action is controlled, disposed on the opposite face of the V.
The invention and the advantages which it provides will however be better understood with the aid of the example of embodiment given below by way of indication but r" 3a without constituting a limitation, and illustrated by the accompanying drawings, in which: Figure 1 is a schematic view of a rotating laser beam control system including a receiver forming a preferred embodiment of the invention; Figure 2 is a schematic view in perspective of o 0
L
-I :.04 1__ 4 the receiver assembly according to the invention; Figure 3 is an exploded view showing the structure of a receiver assembly of this kind; and Figure 4 is a top plan view illustrating one form of construction of the casing supporting the receiver and enabling it to be fastened on a mast associated with the machine.
Referring to the accompanying figures, the receiver for rotating lasers according to the invention, which is given the general reference (see Figure 2) is essentially in the form of a receiver assembly proper comprising plates carrying photodiodes This assembly is mounted in such a manner as to form a pillar on a support casing given the general reference the assembly being protected by a peripheral shell (28) based on a material permeable to the laser beam and equipped with a polarizing or electronic filter.
According to the invention, and as can be seen more particularly in Figure 3, the receiver assembly (6) comprises essentially three photodiode plates (only one of these plates being shown in Figure these plates being disposed around a central support shaft securing them and forming between them an angle of 60' to one another. According to the invention the plates are fastened around the central shaft (10) in such a manner that not only are they mounted detachably but the entire assembly is damped. For this purpose, as can be seen in the accompanying Figure 3, the central shaft (10) is surrounded by a layer of damping material (11) (for example a rubber tube), the shaft being held by two hexagonal struts (12, 13), and two top and bottom support damping members (14) and (15) respectively being disposed one at each end.
The hexagonal struts (12, 13) serve not only to hold identical U-shaped support plates (16, 17, 18), but also to effect perfect positioning of the photodiode plates at 600 to one another. These plates are held on the support members (16, 17, 18) by means of clamp angles (19, 20) locked laterally by means of screws Wi iCj~ r i i against the side faces of the U-shaped supports. The projecting parts of the angles (19, 20) secure the plates at their sides.
An assembly of this kind is mounted on a support casing of substantially parallelepipedic shape, which is essentially in the form of a block comprising two parts (21, 22), one part (21) supporting the actual receiver 6 and the other part which is articulated relative to the first part, enabling said support to be locked on the holding pillar or mast associated with the machine (see Figure In the preferred embodiment illustrated in Figures 2 and 3, in order to achieve not only perfect locking of the assembly around the pillar but also to damp shocks, locking is effected by providing on the part (21) of the support block a V-shaped zone against which the pillar will bear. This V-shaped zone is covered with a layer of damping material (23), for example rubber. The assembly is clamped around the support pillar on the one hand by means of a locking member (24) (for examplelog- te pivoting hook typE), and on the other hand by means of a presser system consisting essentially of a shoe eted=&n by a calibrated spring (26) which enables the pressure to be controlled.
A casing of this kind thus enables the receiver to be easily installed and detached and in addition achieves perfect, precise positioning of the receiver around the support shaft mounted on the machine.
Finally, the receiver is capped by a protective hood (27) (see Figure 2) projecting beyond the peripheral shell, its diameter advantageously being equal to the width of the support block. In this way, when the receiver is detached, it can be laid on its side without any risk of damage, because it will then be supported on the one hand on the block and on the other hand on the periphery of the hood Moreover, the protective hood (27) is screwed from the inside on the shaft and for this purpose is provided with a blind tapped hole (not visible in the drawings), which thus does not extend S to the top face, so that perfect leaktightness of the 6 assembly is achieved. In addition, this leaktightness is also improved by the provision of additional seals (not shown), which are disposed at the two ends of the shell in order to eliminate any risk of infiltration of water or dust.
In comparison with laser receivers proposed hitherto, the invention offers numerous advantages through the fact that it not only makes it possible to detect the passage of the laser beam over 360' while using only three photodiode plates (instead of four as hitherto), but that in addition, through its design, it permits easy detachment of the photodiode plates for the purpose of their replacement in the event of their being damaged or suffering deterioration. Furthermore, since the entire assembly is mounted on damping blocks, the vibrations :ransmitted by the machine in normal use will not disturb the operation of the assembly. Finally, as the receiver is mounted eccentrically on the support casing relative to its mounting axis on the machine, it is possible, by simple pivoting, to dispose it either on the outside of the machine, or in the inside if there is any risk of collision or shocks (for example when working inside a building).
The invention is obviously not restricted to the example of embodiment described above, but covers all variants thereof which are based on the same principle.
Claims (4)
1. A receiver for receiving signals transmitted from rotating beam lasers for guiding a machine, said receiver comprising: a receiver assembly disposed on a support for fastening said receiver assembly on the machine, said receiver assembly consisting essentially of plates carrying photodiodes disposed around a fixed shaft to form a pillar such that the laser beam can be detected over 3600, and a peripheral shell capped by a protective hood about said receiver assembly, wherein the photodiode plates are three in number, disposed vertically around a vertical, central support shaft forming an angle of 600 to one another, means for detachably mounting said plates to said shaft and damping membezs disposed at each end of the plate support shaft and around the shaft.
The receiver according to claim 1, wherein the peripheral shell is capped by a protective hood which projects beyond the peripheral shell and generally eliminates risk of damage to said shell when the receiver is removed and laid on its side.
3. The receiver according to claim 1, wherein the support supporting the receiver assembly is generally in the form of a parallelepiped casing consisting of two parts articulated to one another, one part supporting the receiver assembly and the other part being provided with means for locking said casing onto a support mast.
4. The receiver according to claim 3, wherein the locking means of the casing on the support mast is effected by means of an assembly comprising a V-shaped part which bears against the mast, said V-shaped part being covered with a layer of damping material, and the clamping of the assembly around the support mast being achieved by a pivoting hook locking member, and a presser I -8- mechanism consisting essentially of a shoe biased by a calibrated spring enabling the pressure to be controlled. DATED this 7th day of March 1991 GV S.A. Patent Attorneys for the Applicant: F.B. RICE CO. 2n a J j, 9 9 ABSTRACT RECEIVER FOR ROTATING LASERS USED FOR GUIDING MACHINES, PARTICULARLY PUBLIC WORKS MACHINES. Receiver for rotating lasers used for guiding machines (for example public works machines), which comprises a receiver assembly proper disposed on a support enabling it to be fastened on the machine, said cell (sic) consisting essentially of plates (7) carrying photodiodes and disposed around a fixed shaft in such a manner as to form a pillar enabling the passage of the beam to be detected over 360', the assembly being protected by a peripheral shell (28) capped by a protective hood (27). It is characterized (sic) the photodiode (8) plates are three in number and are disposed vertical- ly around a central support shaft to form between them an angle of 600 to one another, the mounting being effected in such a manner that they are detachable and their fastening being achieved with the aid of damping members disposed at each end of the plate support shaft and around the latter.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8806559 | 1988-05-10 | ||
| FR8806559A FR2631457B1 (en) | 1988-05-10 | 1988-05-10 | RECEIVER OF ROTATING LASERS USED FOR THE GUIDANCE OF MACHINERY, PUBLIC WORKS IN PARTICULAR |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU3563789A AU3563789A (en) | 1989-11-29 |
| AU611031B2 true AU611031B2 (en) | 1991-05-30 |
Family
ID=9366349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU35637/89A Ceased AU611031B2 (en) | 1988-05-10 | 1989-05-09 | Receiver for rotating lasers used in the guiding of vehicles, particularly for public works |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5022763A (en) |
| EP (1) | EP0366772B1 (en) |
| AU (1) | AU611031B2 (en) |
| FR (1) | FR2631457B1 (en) |
| WO (1) | WO1989011107A1 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991004378A1 (en) * | 1989-09-14 | 1991-04-04 | Kabushiki Kaisha Komatsu Seisakusho | Blade controller of bulldozer |
| FR2657172A1 (en) * | 1990-01-12 | 1991-07-19 | Gv Sa | IMPROVED DEVICE FOR ORIENTATION AND GUIDANCE OF MACHINERY. |
| WO1993008003A1 (en) * | 1991-10-22 | 1993-04-29 | Weiland, Pamela | Improvements in or relating to floor milling machines |
| SE9402047L (en) * | 1994-06-13 | 1995-12-14 | Contractor Tools Ab | Method and apparatus for remote control of one or more working machines |
| US5951612A (en) * | 1996-07-26 | 1999-09-14 | Caterpillar Inc. | Method and apparatus for determining the attitude of an implement |
| JP2003004528A (en) * | 2001-06-19 | 2003-01-08 | Topcon Corp | Light receiver |
| ES2244301B2 (en) * | 2003-12-02 | 2008-02-16 | Universidad De La Laguna | LOW COST DEVICE FOR THE LOCATION OF AUTONOMOUS ROBOTS. |
| US7123353B2 (en) * | 2004-05-07 | 2006-10-17 | Tsung-Jung Hsieh | Method for monitoring slope lands and buildings on the slope lands |
| US7536242B2 (en) * | 2004-11-12 | 2009-05-19 | The Boeing Company | Optical laser guidance system apparatus and method |
| US9671094B2 (en) | 2010-07-22 | 2017-06-06 | Renishaw Plc | Laser scanning apparatus and method of use |
| DE102014004370B4 (en) | 2014-03-26 | 2015-11-05 | Hendrik Hippe | Device for processing floor surfaces |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3719424A (en) * | 1970-12-28 | 1973-03-06 | Gen Electric | Radiant energy sensor |
| AU6639881A (en) * | 1981-01-21 | 1982-07-29 | Marcel J. Boulais | Controlling a ground-levelling machine |
| AU8051987A (en) * | 1986-10-30 | 1988-05-05 | Terence Paul Byrne | A position sensing apparatus |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3209148A (en) * | 1955-06-23 | 1965-09-28 | Pavry Francis Hilary | Recording direction finder for bursts of radiation |
| DE1211302B (en) * | 1963-07-09 | 1966-02-24 | Telefunken Patent | Holding device with quick lock |
| US3887012A (en) * | 1973-12-03 | 1975-06-03 | Caterpillar Tractor Co | Automatic levelling system for earth working blades and the like |
| US4162708A (en) * | 1975-02-03 | 1979-07-31 | Dakota Electron, Inc. | Tool carrying vehicle with laser control apparatus |
| US4200787A (en) * | 1978-05-30 | 1980-04-29 | CLS Industries, Inc. | Fiber optic elevation sensing apparatus |
| JPS5764818A (en) * | 1980-10-08 | 1982-04-20 | Toshihiro Tsumura | Steering signal generator of traveling object |
| US4700301A (en) * | 1983-11-02 | 1987-10-13 | Dyke Howard L | Method of automatically steering agricultural type vehicles |
| DD239468B1 (en) * | 1985-07-09 | 1989-02-15 | Senftenberg Braunkohle | ALL-ROUND TEMPERATOR WITH VERTICAL FOCUSING EFFECT |
-
1988
- 1988-05-10 FR FR8806559A patent/FR2631457B1/en not_active Expired - Lifetime
-
1989
- 1989-05-09 AU AU35637/89A patent/AU611031B2/en not_active Ceased
- 1989-05-09 EP EP89905703A patent/EP0366772B1/en not_active Expired - Lifetime
- 1989-05-09 US US07/465,096 patent/US5022763A/en not_active Expired - Fee Related
- 1989-05-09 WO PCT/FR1989/000221 patent/WO1989011107A1/en active IP Right Grant
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3719424A (en) * | 1970-12-28 | 1973-03-06 | Gen Electric | Radiant energy sensor |
| AU6639881A (en) * | 1981-01-21 | 1982-07-29 | Marcel J. Boulais | Controlling a ground-levelling machine |
| AU8051987A (en) * | 1986-10-30 | 1988-05-05 | Terence Paul Byrne | A position sensing apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2631457B1 (en) | 1990-08-17 |
| EP0366772A1 (en) | 1990-05-09 |
| WO1989011107A1 (en) | 1989-11-16 |
| AU3563789A (en) | 1989-11-29 |
| US5022763A (en) | 1991-06-11 |
| EP0366772B1 (en) | 1991-11-27 |
| FR2631457A1 (en) | 1989-11-17 |
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